I visited twice during a recent stay at the JW Marriott. I found this buffet to offer a good variety and an excellent value. Gourmet? No. But at $15 to $20 per person for dinner, depending on the day of the week, it's satisfying and offers something for everyone.
The service was friendly though it was sometimes difficult to get a drink refill: I had to flag someone down.
Overall, I wouldn't go out of my way to come here but if you are in the neighborhood and looking for a buffet without venturing to the casinos closer to the city, this is a decent place.